Autogenous welding and cutting machine



March 31, 1936. A. SCHMIDT" AUTOGENOUS WELDING AND CUTTING MACHINE,

Filed Ot. 28, 1933 '3 Sheets-Sheet l March 31, 1936.

A. SCHMIDT AUTOGENOUS WELDING ANDlCUTTING MACHINE Filed Oct. 28, 1953 3Sheets-Sheet 2 A. SCHMIDT March 31, 1936.

AUTOGENOUS W ELDING. AND CUTTING MACHINE Filed Oct. 28,.1935 3Sheets-Sheet 3 III! 7 71/4714 a l/42H illi/w working on tubeaandmakesuse of the principle known in connection withjautogenous welding andcutting machines of other'types, by which- Patented Mar. 31, 1936AneIicatienomta-zaisa,

BeriaINo. mm 1m 1 acclaim; (c1.

A torm of dcuttingmachinetor the burner is controlled in its movement bythe rolling of a driving wheel against the outer surface of, acylindrical'bodm'as describedin U. S. Patents Nos. 13213878! 1,921,888.In these known machines, which are intended to serve, for example, forcutting plates', th'e driving wheel, which 18 plvotedabout an axis 81; 86118188 to its axis of rotation, is in a fixed casing, and thecylindrical body is with the carrier of the burner. The movement ot theburner is controlled by' virtue oithe fact that. the

movement of the driving wheel on theouter sur I invention .to a newandface of the rotatable and slidably mountedcylinder is resolvable intotwo components of which the component'coinciding with the axis oi'thecylinder results in a longitudinal displacement oi the cylinder, whilethe rotary movement of the cylinder is transmitted toa carriage on whichthe entire outfit is mounted. In another form.

of construction of such machines the cylinder is merely rotatably butnot slidably'mounted, and

the casingoithedriving wheel connectedtothe burner holder or carrier. Inthis case the abovementioned component is transmitted directly to theburner, and the rotary movement, as. before,

to the carriage.

In accordance with the present invention, as

from both' the above-mentioned types oicons'tructlon, both the burnerand the wheel are fixedly mounted, and the place oI-the cylinder is:taken by the workpiece (tube) itself which is independently rotatable ona carriage.

With arrangement. ii the driving wheel be caused to rotate, through theintermediary of a searing head, and guided'by hand to follow the linesoia drawing it over the surface of tube and at the same time impart to thelatter an axial, rotary, or combined movement, according to its ownmovement. The tube is thus caused'to carry out, relatively to the fixedburner,

, a movement the contour of which corresponds to oi thefcut to bemade.Inplace or a can be attached to-the tubela tempietjwhich is grasped andfollowed, tor the Q9" the drivingfwheel. In this latter case .that byhand is dispensed with ."me'inv'entionhirther relates to certain 'de oithe construction oi trolling oi the machine, by a pair or rollers.

mechanically and posior such standards oi which only the embodying theinvention is shown, by way of example, in the ac-' compsnying drawings.in which:' Fig. Us a front elevation of the entire-machine,

mp2 isa side elevation oi-the entire machine, in part section. v v

Fig..3 shows a gearing headanjd burner together with'their positivelyacting interconnecting m, in longitudinal section. I

Fig. 4 shows the same in transversesection. Pig. 5 is a longitudinalsection oi a portionoI- the gearing head. 2 a

Fig. 6 shows atemn c with standing rib or the-type used in connectionwith themachine is according to the invention, and the manner of fattaching the same'to the workpiece. Referring to the drawings,- theupright framework i isconnectedbymeansoiangleirons l to standards a towhich there are attached; u-

girders 5 carrying rails and supported on pairs end be seen in elevationin'l'ig. .2. On the saidrails there travels a carriage consisting or aplurality otpartsotwhichtwoareshowninl 'ig. 1. Eachpartotthecarriagerunsonthreewheelsmcunted in ofl-set relation. I Thewheels I are disposed anangleironlconnectedtothememberlbygo means or twotransverse angle irons ii. In slots II in the angle irons' ii! there areguided and adjustably fixable, by means of bolts II, the lower ends ortwo pairs of crossed arms ll arranged parallel to each other. The upperends of the 5 arms lt-are, provided with rollers l4 forming a cradleonwhichthe tube ll tobe cutcanberotatably. supported ata plurality ofpoints. The adjustment or the crossed arms to suitthediameter of thetube'is facilitated by the provision or to graduation marks ll above theslots ll. Since the rollers 01' thecradle are higher the nearer they arebrought together; workpieces oi smaller diameter will be supported at ahigher level than large workpieces, so that whatever the size of 5 thetube being worked, the uppermost portion 'thereotwill always beatappro'x'imately the same level, and the cuttingburner in enabled towork constantly at one level. The individual parts of the carriage arecapable oi being coupled togetherby means of rods II which are passedthrough eyes It in the angle irons ll, andretained in position byset-screws ll. The wheels t on the-severalparts oi the carriage are .ar-

ranged alternat ly on-the two rails 4: that is u 2 to say, the wheels tofone carriage part run on onerailandthewheelsiofthenextcan-iagepart runon the opposite rail. These wheels are flanged on both sides, so thatthe entire carriage is guided reliably and without jamming orcross-binding, even if the spacing of the rails be not particularlyaccurate. The mounting of each partof the carrlage on three wheelsbearinguponallthewheals. 7

n the upright'framework I there aretwopaiisofbearingsllforthearticulateattachment of tubes 2| each pairofwhich is interconnectedbymeansoftuhesfltoformaframel The forwardends,'of the tubes II are provided 7 7 one on each side. Throughapertures; in these 7.

connecting pieces there are tubes ll which with drilled lugs 23 for theattachment of bridging or connecting pieces 24 between the frames,

project on both sides, and which carry-on the one side the casing II ofthe gearing head, and on the other side the holder}? of the burner II.

The-casing 28 bears with the driving or tracking wheel upon the tube I!to be out. On the upright framework I there is provided ahearing plate30 for the housing 3| of transmision gearing which can bedriven by amotor. To the shaft 38. (Fig. driven by this motor there is secured atoothed wheel which meshes with a toothed wheel is connected toailexible shaft 36. The shaft 3 is attached by its other end tova bevel:wheel; II which engages a'toothed sleeve 38 which in its turnmesheswith a bevel wheel". This-bevelwheel II is mountedin a two-partcasing 40, 40', and is attachedeto a spiral gear ll engaged bytwospiralgear-s42 on which the sleeve 38 is mounted, and on which there is fitteda portion 49 of the casing which enclosesthe parts 31 and II.

The casing portion 40' rests, with the interposition'of-a ball bearing,upon'the bottom of' the casing 28, and projects therethrough. To

the.:pin there is attached a shaft II which carries a. chain sprocketwheel II, and which is mounted in a ball bearing in the casing ll.

Atthe end of this shaft there is provided a handle I pivotally mountedby means of a bolt H, by means of'which the pin 48,"

together with the casing 40, II and the driving or tracking wheel 2! canbe tilted.

The chain 54 travclingover the sprocket wheel Iiistakenthroughthetubeiltoaspmcket wheel II which is longitudinally'slidable but locked against rotation (key I!) on the spindle ll of theburner. An arc piece I. is rigidly connected to thespindle I1.Thearc'piecehas an arc-shaped guide slot disposed in a vertical plane,in which slot the burner holder II is 'slidablymounted.Bymeansofawingnuttl theburnerholderitcanbeiixedinanydesired angularposition. The burner "is rotatably mountedintheholderllandishfldthereinby means of a spring' bolt ill inan annugroove(noteshownl in the burner I... The

burnenhastwo laterally Pr jecting nipples Ill and ill' for of tubes IIIand a,oas,7ss

iii to supply the combustible gas and oxygen,

respectively. This means of gas supply is shown, for example, in myprior patent, 1,921,888. A

hand-wheel Cl is provided in a known manner for the adjustment of theheight of the burner. To one of the tubes 22 there is attached an anglepiece 02 to the ends of which there are articulated anarm 83 and aconnecting rod 64. The arm I can be hooked up by means of a notch II tothe upper edge 66 of the upright framework I, by which means theparallelogram of links together with the entire guiding can. be retainedin the lifted position.

Coup] to the free end of' the 'arm a there is a tension rod 81 which ispivoted to a handle I. mounted on the parallelogram of links. The

connecting rod is attached to a piston adapted to travel in a casing 60which is pivotally attached at (I to the stand i of the machine, by

means of a rod I0.

when the part 41 with the driving. wheel 29 is detached, the milledrollers can be used in a known manner for controlling the machine bytemplet (see Fig. 6) provisionally attached to the tube I 5 to be cut.-The securing of the templet II in position can be effected by means ofsteel straps I! hooked into the base flanges of the templet.

'fAft'er the tube to be out has been placed in position on the rollersll of the carriage, the

lever 63 is unlatched by a. pull on the handle it,

with the result that the parallelogram of links together with the guidemechanism descends of its own weight, but braked by the action of thedamping device 69, until the drivingwheel -29 comes to rest upon thedrawing spread out or traced on the surface ofthe'tub'e. After theswitching on of the motor 32, the flexible shaft 36 is rotated, throughthe intermediary of the reduction gearing, and with it the driving wheel29, through the train 31, 38, 39, H, 42, 44. Thedriving wheel is causedto follow accurately the outline of the drawing, by suitable operationof the handle 53. By this rolling of the driving wheel against thesurface of the tube, the latter,

as explainedat theoutset, is caused to cany out a resultant movementrelatively to the burner corresponding to the outline of the drawing, so

that the required cut is produced.

Ifit is desired that the out be inclined and not at right angles to thesurface of the workpiece, the burner holder 59 is tilted to the desiredangle in the arcuate guide 58, and then fixed in position by means ofthe nut 60. The tilting or swivelling movement" of the driving wheel istransmitted, through the chain drive 5!, 54, 55, to the spindle 51 andburner holder 59, so that the angle of the burner to the surface of thetube remains constant.

when teniplets are employed there is no need for controlling themovement of the driving wheel by means of the handle 53, since therollers 44, v

by grasping the upstanding flange of the templet,'eflectautomaticallythe guiding of the tube, for the production of the requiredmovementto obtain a cut corresponding exactly to the pattern of thetemplet, .as will be clear from the drawings.

I claim:

1. An autogenous welding and cutting machine for working on tubes,comprising a burner holder, a burner carried thereby; means to-supportthe tube for free axial and rotary motion in proximity to said hi her;and means for impartingcombined rotary movements to the tube,

driven pair of rollers and a third detachable roller embraced and drivenby said pair of rollers and adapted to engage the sm'iace o! the tube.

5. In an autogenous welding and cutting machine ior working on tubes;means to support the tube for free axial and rotary motion; a burnerholder, a gear head, a common support on which said burner holder andgear head are mounted in proximity to the tube; said gear headcomprising a positively driven, swivelling, driving device. and a handleto turn thelatter on its swivel to any desired angular position withrespect to the axis or the tube; said driving device being adapted toimpart combined axial and rotary movements to said tube under thecontrol of said handle.

6. A machine as described in claim 5, wherein said common support ispositioned above the tube and is vertically movable to and fromvoperative position.

7. In an autosenous welding and cutting machine ior working on tubes;means to support the an axis transverse toits aids oi swivelling; a

gear head swivelly' mounted on said support and comprising driving meansto impart combined axial and rotary motions to the tube; and meansinterconnecting said gear head and burner holder to cause them to swivelin unison.

' 8. A machine as described in claim 7, wherein said meansinterconnecting said gear head and burner holder comprise a chain andsprockets, the two sides 01' said chain being inclosed in pipes forminga part of said supp l 9. A machine as described in claim 8, wherein saidmeans interconnecting said gear head and burner holder comprise a chainand sprockets, the two sides of said chain being inclosed in pipesforming a part of said support, said burner holder and gear head beingadjustably mounted on said pipes for regulating said chain.

10. In a machine for autogenous cutting and welding 01 tubes, means tosupport the tube for tree longitudinal and rotary motion, comprising acarriage consisting oia plurality 01 parts coupled together and a trackupon which said carriage travels, each oi said parts having a set ofthree wheels arranged two on one track and one on the other; a supportabove the tube. and a burner holder and a gear head mounted on'saidsupport; said gear head comprising means to impart longitudinal androtary motions to the tube.

11. A machine as described in claim 10, wherein the parts of saidcarriage are coupled together in such a way that the two wheels oi eachpart arranged one behind the other are supported alternately on the tworails, so that a carriage having said two wheels running on one rail isfollowed by a carriage having said two wheels running on the other rail.

12. In a machine for autogenous welding and cutting of tubes, acarriage, a pair oi crossed arms pivoted together between their ends andhaving their lower ends adiustably secured in transverse slots in saidcarriage, rollers on the upper ends of said arms for rotatablysupporting the tube,'and a burner holder and gear head mounted inopposed relation to said crossed arms,

l3.-In a machine for autogenous welding and cutting of tubes, means tosupport the tube for iree'axial and rotary motion, a burner holder, agear head, a common support comprising a parallelogram of links on whichsaid burner holder and gear head are mounted, a stationary frame towhich said common support is connected by two joints, thearrangementbeing such that said burner holder and gear head can be made to approachand recede from the tube by the motion of said common support, said gearhead comprising means for imparting axial and rotary motions to thetube.

'14. A machine as described in claim 13, in combination with a dampingdevicecontrolling the approaching and receding motions of said commonsupport.

15. A machine as described in claim 13, in combination with a hookdevice to hold said common support in retracted position.

16. In a machine for autogenous welding and cutting of tubes, means tosupport the tube for free axial and rotary motion, a burner holder, agear head comprising means for imparting axial and rotary motions to thetube, a common support for said burner holder and gear head comprising astationary frame and parallel links articulated thereto, said burnerholder and gear head being articulately mounted upon the outer ends ofsaid links so as to be held in a fixed angular relation to said frame asthey swing toward and away from the tube.

ADAMv SCHMIDT.

CERTIFICATE OF CORRECTION.

Patent No. 2,035,765.. March 51, 1936.

ADAM SCHMIDT.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 3,-first column, line 53, claim 9. for the reference numeral "8" read 7;and that the said Letters Patent should be read with this correctiontherein that the same may conform to the record of the case in the'Patent Office.

Signed and sealed this 5th day of May, A. D. 1936.

Leslie irazer (Sea1) Acting Commissioner of Patents.

